class Rectangle extends PS
{
     Point pp1,pp2,pp3,pp4,cp; double scale=1.0; double lw=1.0;
     int itype=1; 
     
     public Rectangle(Point p1, Point p3)
     {
       double ccx,ccy;
       Point p2=new Point(p3.px, p1.py);
       Point p4=new Point(p1.px, p3.py);
       pp1=p1;pp2=p2;pp3=p3;pp4=p4;
       ccx=(pp1.px+pp3.px)/2.0;
       ccy=(pp1.py+pp3.py)/2.0;
       pp1.center(ccx,ccy);pp2.center(ccx,ccy);pp3.center(ccx,ccy);pp4.center(ccx,ccy);
      }

     public Rectangle(Point p1, Point p2, Point p3, Point p4)
     { 
       double ccx,ccy;
       pp1=p1;pp2=p2;pp3=p3;pp4=p4;
       ccx=(pp1.px+pp2.px+pp3.px+pp4.px)/4.0;
       ccy=(pp1.py+pp2.py+pp3.py+pp4.py)/4.0;
       pp1.center(ccx,ccy);pp2.center(ccx,ccy);pp3.center(ccx,ccy);pp4.center(ccx,ccy);
      }

    void move(double x, double y)
      {
         pp1.move(x, y);pp2.move(x,y);pp3.move(x,y);pp4.move(x,y);
      }

    void center(double x, double y)
       {
        pp1.center(x, y);pp2.center(x,y);pp3.center(x,y);pp4.center(x,y);
      }

    void rotate(double theta)
       { 
        pp1.rotate(theta);pp2.rotate(theta);pp3.rotate(theta);pp4.rotate(theta);
       }

    void expand(double times)
       { 
        pp1.expand(times);pp2.expand(times);pp3.expand(times);pp4.expand(times);
      }

    void draw()
       {
       double x1, y1, x2, y2, x3, y3;
       this.plot(pp1.px, pp1.py, 3);this.plot(pp2.px, pp2.py, 2);
       this.plot(pp3.px, pp3.py, 2);this.plot(pp4.px, pp4.py, 2);
       this.closepath();this.stroke();
      }
}